connecting to database?

I am getting an error message and I dont know why!
this pops up when I try to view my site :

” Warning: require_once(/home/wp_kbb6bx/wanderlustseries.com/wp-config.php): failed to open stream: Permission denied in /home/wp_kbb6bx/wanderlustseries.com/wp-load.php on line 29

Fatal error: require_once(): Failed opening required ‘/home/wp_kbb6bx/wanderlustseries.com/wp-config.php’ (include_path=’.:/usr/local/lib/php:/usr/local/php5/lib/pear’) in /home/wp_kbb6bx/wanderlustseries.com/wp-load.php on line 29 “

I was directed by someone to a site telling me how to move from wordpress.com to www.remarpro.com as a start of how to solve this problem – but I dont know why. “but the database your wp-config.php file connects to has no database”. what does that mean? how do I fix that?

I host with dream host, and this message started appearing last night when I (attempted to) link the host and domain (by entering ns1.dreamhost.com etc etc). Im new at this obviously, and clearly dont fully understand everything.

The blog I need help with is wanderlustseries.com.

Am I correct in that if I am running through wordpress.com that it is all hosted through wordpress and that I dont need to be hosted through dreamhost?
Super confused. any help would be appreciated!